<template>
	<view>
    <my-search @click="gotoSearch"></my-search>
    <view class="scroll-view-container">
    	<scroll-view scroll-y="true" class="left-scroll-view" :style="{height: width+'px'}">
    	  <block v-for="(item,i) in cataList" :key="i">
          <view :class="['left-scroll-view-item',i===active?'active':'']" @click="onChangeActive(i)">{{item.cat_name}}</view>
        </block>
    	</scroll-view>
      <scroll-view scroll-y="true" class="right-scroll-view"  :style="{height: width+'px'}" :scroll-top="scrollTop">
        <view class="cate-lv2" v-for="(item,i) in cateLevel2">
          <view class="cate-lv2-title">{{item.cat_name}}</view>
          <view class="cate-lv3">
            <view class="cate-lv3-item" v-for="(item2,i) in item.children">
              <image :src="item2.cat_icon" mode="" @click="gotoGoodsList(item2)"></image>
              <text>{{item2.cat_name}}</text>
            </view>
          </view>
        </view>
      </scroll-view>
    </view>
  </view>
</template>

<script>
  import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
    mixins:[badgeMix],
		data() {
			return {
        active:0,
				width:0,
        cataList:[],
        cateLevel2:[],
        scrollTop:0
			};
		},
    onLoad() {
      const sysInfo =  uni.getSystemInfoSync()
      this.width=sysInfo.windowHeight-50
      this.getCateList()
    },
    methods:{
      async getCateList(){
        const {data:res} = await uni.$http.get('/api/public/v1/categories')
        if(res.meta.status!==200) return uni.$showMsg()
        this.cataList=res.message
        this.cateLevel2=res.message[0].children
      },
      onChangeActive(i){
        this.active=i
        this.cateLevel2=this.cataList[i].children
        this.scrollTop=this.scrollTop===0?1:0
      },
      gotoGoodsList(item){
        uni.navigateTo({
          url:'../../subpkg/goods_list/goods_list?cid='+item.cat_id
        })
      },
      gotoSearch(){
        uni.navigateTo({
          url:'/subpkg/search/search'
        })
      }
    }
	}
</script>

<style lang="scss">
.scroll-view-container{
  display: flex;
  .left-scroll-view{
    width: 120px;
    .left-scroll-view-item{
      background-color: #f7f7f7;
      line-height: 60px;
      text-align: center;
      font-size: 12px;
      &.active{
        background-color: #ffffff;
        position: relative;
        &::before{
          content: '';
          display: block;
          width: 3px;
          height: 30px;
          background-color: #c00000;
          position: absolute;
          left: 0;
          top: 50%;
          transform: translateY(-50%);
        }
      }
    }
  }
}
.cate-lv2-title{
  font-size: 12px;
  font-weight: bold;
  text-align: center;
  padding: 15px 0;
}
.cate-lv3{
  display: flex;
  flex-wrap: wrap;
  .cate-lv3-item{
    width: 33.33%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
    image{
      height: 60px;
      width: 60px;
    }
    text{
      font-size: 12px;
    }
  }
}
</style>
